Internal-combustion engine.



n. DUNLOP al1. u. DAVIS.

INTERNAL, COMBUISTION ENGINE.

lAPPLICATION FILED JUNE kZI ISI?.

DAVID DUNLoraND .ToHN 1D. DA'vIs, oF rn'rnnsnote, vIaeINiA.

xNrEaNAD-oousrron ENGINE.

Specication ot Letters Patent.

Patented Oct.' 1, 1918.

Application led .Tune 21, 1917. SerialfNo. 176,134. v

To all whom A'it may concern.'

Be it known that we, DAVID DUNLOP and JOHN D. DAv1s,' citizens of -the United States, and residents of Petersburg, in the county of Chesterfield and State of Virginia, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification. Our invention relates to internal combustion engines and more particularly to an attachment for the same. n.

The primary object of the present invention is to provide means associated with an internal combustion engine whereby the engine will run with a maximum speed and yet only consuming a minimum amount of gasolene, thus effecting a material saving of the same.

A further object of the present invention is to provide an additional air supply for internal combustion engines which is auto matically operated. y

Another important object of the present invention is to provide an attachment for supplying air to interna1 combustion engines which is thermally operated.

A still further object of the present invention is to provide an attachment of the above mentioned character which may be appliedto any internal combustion engine.

An additional object of my invention is to rovide a thermostatic or expansiblebar which is mounted above the exhaust mani fold of an internal combustion engine and is operated thereby, and having means associated therewith for automatically operatin an air valve.

1th the above and other objects 1n view, the invention conslstsvin the constructions,

combinations and arrangement of parts that will be set forth in detail in the following description and illustrated in the accompanying drawings, in which Figure 1 is a perspective view of van internal combustion engine having our `attachment applied thereto.

Fig. 2 is a perspective view of the air conduit and valve arranged therein.

Fig.. 3 is a longitudinal sectional view through the air conduit, and

Fig. 4 is a sectional view on the line 4-4 of Flg. 3.

Like characters of reference indicate like parts in all the views.

Referring more particularly to the draw-` ing, ythe numeral -15 `indicates anlinternal combustion engine which may be of any conventional type having' the usual intake manifold 6 andthe usual 'exhaust pipe 7. As the engine itself forms no part ofthe present invention, it will not be set forth.

Mounted upon the top of the engine 5 is an outwardly extending supporting member `8 which is attached to one end of an expansible tube 9 Vwhich is disposed above the exhaust pipe 7 and extends longitudinaly thereof. Preferably this tube 9 is ma e of brass but other metals may be used. Also mounted upon the engine 5 is a supporting member 10 having an upwardly disposed extension 11. Pivotally engaged with this extension 11 is a lever 12 which is bent at right angles as .at 13 to provide a horizontal portion 14 which extends outwardly and beyond the plane of the intake manifold 6 and then extended downwardly. This lever is provided with a plurality of alined openings 15. The expansible tube 9' is pivotally connected with the lever 12 adja cent its upper end as at 16.-

'Threaded inthe intake manifold 6 is an L-shaped air conduit 17 which is interiorly threaded at its outer end and receives a short. pipe 18 which constitutes a valve chamber.' This valve chamber is provided with triangular-shaped openings 19. Mounted in the valve chamber 18 is a slide valve 20 with which is engaged a rod 21. This rod 21 has its outer end detachably engaged in any one of the'openings 15. It will be seen that by providing these openings 15,

the movement of .the valve 20 may be length-` ened or shortened, as the case may be.

From the above description, it will be seen that the warmer the exhaust pipe gets, the more the tube 9 will expand thus rocking the lever 12 which moves the rod 21 longitudinally thereby moving the valve 2O to permit the passage of air through the openings 19 into the air conduit 17 and thence into the intake manifold 6.

From the foregoing description taken in connection with the accompanying drawings the changes of the constructionand the method of operation will be readily understood by those skilled in the art to which the invention appertains and while we have described the parts of operations together with the device which we now consider to be the'best embodiment thereof, we desire it understood that the device shown is merely illustrative and that such changes may be made when desired as fall within the scope of the appended claim.

What We claim is:

The combination with an internal combustion engine, of an L-shaped' airconduit in communication with the intake manifold thereof, said conduit being provided with a valve chamber having a plurality of triangularly shaped openings therein, the bases of said triangles lying in a common plane passed traneverrsely through seid chamber, a reciproeatory valve mounted within said chamber for opening and closing said openings, and a thermostat associated with the engine and having connection 'with said valve for actuating the Same upon the rising or falling of temperature of the engine.

DAVID DUNLOP. JOHN D. DAVIS. 

